【摘要】 设计了一种结构简单、加工工艺要求较低的双锥流量计,在此基础上提出了基于单个差压式流量计的气液两相流参数测量方法。提取双锥流量计差压波动信号的无量纲特征值,利用该参数建立气相体积含率的测量模型。通过对双锥流量计差压信号均值的分析表明,Lockhart-Martinelli常数与准气相流量比存在优良的线性关系,根据该线性关系建立了双锥流量计气液两相流流量测量模型。在气水两相流装置上开展了实验研究,结果表明,所建立的分相含率测量模型可在实验范围内对气相体积含率进行有效的测量,测量相对误差在8%以内;对气液两相流总流量和液相流量的测量误差可在5%以内。更多还原

【Abstract】 A dual-cone flowmeter with advantages of simple structure and easy fabrication was designed, and it was used to measure parameters of gas-liquid two-phase flow through analysis of signals from a single differential pressure flowmeter. Non-dimensional characteristic values of the differential pressure signals were extracted to establish a measurement model for gas volume fraction. Good linear relationship was obtained between the Lockhart-Martinelli constant and the quasi-ration of the gas flowrate by investigation of the average differential pressures of the dual-cone flowmeter. The results show that a modified flowrate measurement model is suitable for using the dual-cone flowmeter to measure the total flowrate of the gas-liquid two-phase flow. The model shows good performance for gas volume fraction measurement with an error of less than 8%. The errors for total flowrate and liquid flowrate measurements are within 5% when using the modified model.更多还原